package Thread;

import java.util.concurrent.Semaphore;

//使用Semaphore类的P与V操作进行线程安全操作的解决；
public class Demo44 {
    private static int count=0;
    public static void main(String[] args) throws InterruptedException {
        Semaphore semaphore=new Semaphore(1);//设置该信号量为二元信号量；
        Thread t1=new Thread(new Runnable() {
            @Override
            public void run() {
                for(int i=0;i<5000;i++){
                    try {
                        semaphore.acquire();count++;
                        semaphore.release();
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        });
        Thread t2=new Thread(new Runnable() {
            @Override
            public void run() {
                for(int i=0;i<5000;i++){
                    try {
                        semaphore.acquire();
                        count++;
                        semaphore.release();
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count的值为："+count);
    }
}
